SCCM collection for active computers

Below is a sample query to create such collection:

select SMS_R_SYSTEM.ResourceID,SMS_R_SYSTEM.ResourceType,SMS_R_SYSTEM.Name,SMS_R_SYSTEM.SMSUniqueIdentifier,SMS_R_SYSTEM.ResourceDomainORWorkgroup,SMS_R_SYSTEM.Client from SMS_R_System inner join SMS_G_System_CH_ClientSummary on SMS_G_System_CH_ClientSummary.ResourceId = SMS_R_System.ResourceId where SMS_G_System_CH_ClientSummary.ClientActiveStatus = 1